Some rooms in tmux have a limit to the number of players in them. If a player tried to flee into them they are kicked straight back out. This is what happened when ferni tried to flee into a room that already has my 2 characters. (note there was no other exit from the room he was trying to flee from.

the mud code works in interesting ways regarding moving rooms (be it walking or fleeing) - It removes you from the current room, adds you to the target room then checks if that is a legal move, if not removes you from the errant target room and dumps you back in the original room again - I can understand the entrance and exit messages might confuse - might get around to rewriting them eventally